Title: Experimental investigation of surface roughness in high-speed micro end milling of near alpha titanium alloy
Authors: Chakradhar Bandapalli; Bharatkumar Mohanbhai Sutaria; Dhananjay Vishnuprasad Bhatt
Addresses: Department of Mechanical Engineering, Madanapalle Institute of Technology and Science, Kadiri Road, Angallu Village – 517325, Chittoor District, Madanapalle, Andhra Pradesh, India ' Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Ichchhanath –395007, Dumas Road, Surat, Gujarat, India ' Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Ichchhanath –395007, Dumas Road, Surat, Gujarat, India
Abstract: Super alloys are widely used in many applications such as aerospace, automotive, biomedical, marine, mining and oil industries. In high-speed micro end milling (HSMEM) of super alloys, the proper selection of cutting tool is necessary to achieve good surface quality without burrs. Surface roughness characterisation is crucial on the work materials to achieve the desired production rate in limited time and at low cost. In this research work, surface roughness characterisation was investigated in order to opt for the better possible tool for machining Near Alpha Titanium Alloy Grade-12 under feasible conditions. The influence of machining parameters i.e. cutting speed, feed and depth of cut on surface roughness was investigated in the present work. Experiments were conducted under dry cutting conditions using Uncoated, PVD Coated TiAlN & AlTiN tungsten carbide tools. It was observed that machining with uncoated tungsten carbide tools generates less surface roughness on near alpha titanium alloy.
Keywords: micro end milling; titanium alloy; uncoated; PVD coated TiAlN and AlTiN tungsten carbide tools; surface roughness; tool wear; burr formation.
International Journal of Precision Technology, 2017 Vol.7 No.2/3/4, pp.87 - 102
Received: 01 Mar 2017
Accepted: 31 Oct 2017
Published online: 15 Mar 2018 *